Home Postcodes by state NSW 2675 Postcode 2675 2675 is the postcode for 5 localities in NSW: Hillston, Lake Brewster, Monia Gap, Roto and Wallanthery. Localities with postcode 2675HillstonNSWLake BrewsterNSWMonia GapNSWRotoNSWWallantheryNSW Postcode 2675 State or territory New South Wales (NSW) Localities 5 Council area Carrathool Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 2672 · Postcode 2678